Asthma: A chronic respiratory condition characterized by inflammation and narrowing of the airways, leading to recurring episodes of wheezing, coughing, and shortness of breath.
Chronic obstructive pulmonary disease (COPD): A progressive lung disease that causes airflow limitation and breathing difficulties. It includes conditions such as chronic bronchitis and emphysema.
Pneumonia: An infection that inflames the air sacs in one or both lungs. It can cause symptoms like fever, cough with phlegm production, chest pain, and difficulty breathing.